Family name Jernakova (Жернакова 
, Jernakova 
) , all around the world, is quite a rare surname. The family name Jernakova is habitual in Russia, where it is a rare surname, Kazakhstan, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Жернакова | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Jernakova | United States |